Combination scraper, charger, and tamper



1.1. AVERY. COMBINATION SCRAPER, CHARGER, AND TAMPER- APPLICATION FILED AUG.4, 1920.

PatentedMay 24, 1921.

A TTORNEYS COMBINATION SCRAPER, CHARGER, AND TAMPER.

To all'whomz't may concern:

Be it known that I, THOMAS J; AVERY, a citizen of the United States, and a resident of Albi'a, in the county of Monroe and State of Iowa, have invented a new and use ful Improvement in Combination Scrapers, Chargers, and Tampers', of whichthe following is a full, clear, and exact description.

My invention relates to improvements in combination scrapers, chargers, and tampers, and it consists in the combinations, constructions, and arrangements herein described and claimedzr v I An object of my invention is to provide a combination scraper, charger, and tamper for use in blasting operations, such as in mining coal, or the like, which combines in one tool means for effectively performing a plurality of functions ordinarily performed by a number of separate. tools.

. A further object of my invention is to provide a device of the type described that can be used in placing and tamping an explosive charge in a desired position for firing without any possibility of producing a spark, whereby the danger of causing a pre mature explosion is obviated.

A further object of my invention is to provide a device of the type described that has means for holding an explosive charge 1 until moved into a desired position and for ejecting the charge in such position, whereby the charge is not scattered along a hole drilled for the reception thereof, as ordinarily occurs. v

A .further object of my invention is to provide a device of the type described that is relatively simplein construction and thoroughly practical commercially.

- ther objects and advantages will appear h in the following specification, and the novel features of the invention willbe particularly pointedout in the appended claims.

Myinvention is, illustrated in theaccom- 'panying drawings, forming part of this application, in which Figure 1 s a plan view. of the'device,

Fig. 2 is a longitudinal section, partly inelevation, of the device,

Fig. 3 is an end view of a port'ion of the devlce,

Fig. 4 is a plan view of the portion of the device shown in Fig, 3. V In carrying out my lnvention, I provide alcylindrical barrel 1 formed with an out- Specification of Letters Patent. Application filetl August 4,'192o. Serial $0,401,260.

scribed in detail. 7

Screwed into a threaded bore 8 in the wanted May 24,1921.

wardly extending flange 2 at its rearward .end, which engages with a ring 3 andma'intains the latter in position on the rearward end of the barrel. The ring 3 is formed with rearwardlyextending arms 4-41, which are bent inwardly toward each other and are hinged at 5 to 'a 'coupling 6. The coupling 6 in the form now preferred by me is special in construction, and will be'h'ereinafter deand is sufiicient in length to have one end projecting a predetermined distance within the barrel 1 when'its other end isisubstantially received within. the coupling 9, A

scraper comprising a s'tem 1 5 and a scraping member'16, whlch' 1s carried at rightangles 4 to the stem 15,-is secured't o the rearward end of the rod 145 This is accomplished by screwing the stem 15,-whi'ch is formed with threadedjbore for that purpose, on the threaded end of the rod 14: until the dia metrically opposed'openings through the stem 15 register with an opening (not shown) which extends through the rod 14 adjacent its end. A pin 19 is'theninserted through the registering openings to main-- tain the tamper in'itsposition. The edges of the openings 17 are be'veled', wherefor the end ofthe pin 19 is countersunk to permit slidable movement of the end of the :stem

7 15 within the coupling 9.

The slidable movement of the stem 15 within the coupling 9 is limited by the op-- positely disposed studs 20%20' which enter theslots lO and 11. The-stem 15 is locked in position when the studs 20 2Q' are main-- tained in the circumferentially extending slots'12 and 13Yby the-action ofa spring pressed stud 21 which engages with the walls of one of the slots 10'or 11.

It will thus be obvious that scrapers having stems varying in length may be used and that the relative position of'the' scrap ing member of each scraper will be the same.

The forward end of therodl i is flatm". strict.

THOMAS: JAMES AVERY, or .ALZBIA, Iowa, I

tened at 21' and is received within a slot 22 in the stem 23 of a plunger 24, which is slidable within the cylindrical barrel 1. A pin 25, or the like, hingedly connects the end of the rod 14 and the plunger stem 23.

The coupling 6 has its sides flattened ex-' teriorly at 2626 (see Figs. 3 and 4) to en-' the drawings for a purpose'that will be hereinafter set forth.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. When the device is in the condition pictured in Fig. 1 of the drawings, it may be used as'a tamper, since the head of the plunger 24' projects beyond the forward end of the cylindrical barrel 1. It will of coursebe understood that the cylindrical barrel 1, the plunger 24, and the sleeve 7 are all formed of some suitable material, preferably brass, which is non-ferrous so that the danger of causing a' spark by contact 'of the same with the work is thereby obviated. When it is desired to use the device as a scraper, the studs 20 are turned in position to be moved along the slots 10 and 11 The tamper isthen moved into extended position, thereby moving the stem of the plunger 24 into the position indicated by the dotted lines in Fig. 2. A cotter pin or the like is then insert ed through the registering openings 29, 30, and 31, thereby preventing retraction of the scraper. It will be understood that the scraper is used in removing the drillings I and the like from the hole, which has been drilled in the coal or other material that is to be blasted. When the plunger 24 is in the position pictured in Fig. 2, the cylindrical barrel 1 may be swung upwardlyinto the position illustrated by the full lines in Fig. 2' when the cotter pin has been withdrawn from theregistering openings 29, 30, and 31. This cannot be accomplished, however, until the'stem" 23 of the plunger 24 occupies the position shown by the dotted for'the cylindrical barrel 1.

lines in Fig. 2. It will'then be observed thatthe head of the plunger-forms a closure A suitable charge of powder or the like may be placed within the cylindrical barrel'l and the forward end of the device inserted within the drilled hole in the coal until the position at which the charge is to be placed is reached. The charge is then ejected by pushingthe'rod 14 forwardly. The device is then in the condition pictured in Fig. 1 of the drawings and may be used to tamp the charge.

The device provides means for effectively accomplishing a number of related objects with a saving in time and labor. Since no ferrous material is exposed or may be brought into contact with'the material to be blasted or other material that .may causexa spark, the danger of a premature explosion is reduced. to a minimum whenmy improved device is used. H 7 It will be observedthat the stem or shank 23 of the plunger is formed with parallel sides arranged to slidably contact withthe sides of the socket 27 when the plunger is in retracted position to prevent'rotation of the barrel 1.'

I claim: 1. A device of the character described comprising a cylindrical non-ferrous barrel, a non-ferrous plunger slidable in said barrel and provided with a rearwardly extend ng shank, a non-ferrous sleeve, a nonferrous coupling carried at the forward end of said sleeve, a rod extending through said sleeveand having its forward end hinged to the end of the plunger shank, means for hingedly connecting the rearward end of said cylinder to said couplingto permit said cylinder to beswung upwardly into a position at right angles to said coupling-when said plunger is in its retracted position, a tamping member having a stem remo'vably secured to the rearward end of said -rod,.a stud projecting from the last named stem at a spaced distance from the end thereof, a coupling carried onthe rearward end of said sleeve, said coupling being formed with a slot through the wall thereof adapted to receive said stud when the rod is moved forwardly throughthe sleeve, said slot being extended longitudinally a spaced distance and then circumferentially wherefor the plunger may be moved forwardly through the cylindrical barrel until thewforward end thereof projects beyond the end of the latter,

and spring means carried by the a stem of said tamping member for engaging with the walls of the slot to normally maintain the stud in the circumferentially extending portion thereof. i 2. A. device of the character described comprising a cylindrical non-ferrous barrel,

a non-ferrous plunger slidable infsaid barrel and provided with l a rearwardly .extending shank having parallel straight side walls, anon-ferrous sleeve, a nonf'ferrous coupling carried at theforward end ofsaid sleeve, saidcoupling being formed with a socket having straight parallel side walls adapted to cooperate with the straight sidedshank of said plunger to prevent rotation of the plunger when the latter is in retracted position, a rod extending through said sleeve and having its forward end hinged to the end of the plunger shank, and means for hingedly connecting the rearward end of said cylinder to said coupling to permit said cylinder to be swung upwardly into a posi tion at right angles to said coupling when said plunger is in its retracted position.

3. In a device of the character described, a sleeve, a coupling having its rearward end secured to said sleeve, said coupling having its side walls flattened exteriorly and interiorly at diametrically opposite points and being formed with a longitudinally extending slot through its wall intermediate the flattened portions, a cylindrical barrel having opposed arms at one end thereof, said arms having their outer end portions formed with parallel straight walls pivoted to the exteriorly flattened portions of the wall of said coupling, a plunger slidable in said barrel, said plunger being provided with a rearwardly extending shank formed with straight sidewalls, and a rod movable longitudinally in said sleeve, said rod being ar- 'ranged to have its inner end projecting within said coupling and pivoted to the shank of said plunger, wherefor said plunger and said barrel can be swung upwardly simultaneously when said plunger is in its retracted position.

4. In a device of the character described, a sleeve, a coupling having its rearward end secured to said sleeve, said coupling having its side walls flattened exteriorly and interiorly at diametrically opposite points and being formed with a longitudinally ex tending slot through its wall intermediate the flattened portions, said slot having a width equal to the distance between the interiorly flattened walls of the coupling, a cylindrical barrel having opposed arms at one end thereof, said arms having their outer end portions formed with parallel straight walls pivoted to the exteriorly flat tened portions of the wall of said coupling, a plunger slidable in said barrel, said plunger belng provided with a rearwardly extending shank formed with straight side walls adapted to closely engage with theinteriorly flattened portions of the wall of said'coupling, and a rod movable longitudinally in said sleeve, said rod being arranged to have its inner end projecting within said coupling and pivoted to the shank of said plunger, wherefor said plunger and said barrel can be swung upwardly simultane ously when said plunger is in its retracted position.

THOMAS JAMES AVERY. V 

